Abnormality monitoring system and molding device

Abstract

To provide an abnormality monitoring system and a molding device which can easily and accurately monitor whether or not abnormality occurs in a component such as a bearing of a molding device.SOLUTION: An abnormality monitoring system 1 and a molding device 10 include: measurement devices 35A and 35B for measuring each parameter TA and TB indicating states of components 30A and 30B each corresponding to each of a plurality of components 27A and 27B of the molding device 10, and each having a mutually similarly changing state according to operation of the molding device 10 even when abnormality does not occur in the plurality of components 27A and 27B; and a monitoring device 40 for monitoring abnormality of the plurality of components 27A and 27B of the molding device 10 corresponding to the plurality of components 30A and 30B on the basis of a difference ΔT between the parameters TA and TB measured by the measurement devices 35A and 35B.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an abnormality monitoring system and a molding device. [Background technology]

[0002] For example, if a malfunction such as seizure or galling occurs in the bearings of a molding device (including a press or injection molding device) due to insufficient lubrication, a relatively large part may have to be replaced, which can be costly and can cause various problems, such as the device being unusable until the replacement is completed. Therefore, in order to prevent seizure and the like that can cause such problems, it has been customary to monitor the temperature and the rate of temperature rise of bearings, etc. Furthermore, for example, Patent Document 1 proposes monitoring the rate of change in the rate of temperature rise of a sliding part such as a bearing, and detecting that the sliding part is in an abnormal state when the rate of change is positive. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3291240 Summary of the Invention [Problem to be solved by the invention]

[0004] However, even if the bearings or the like are not seized, the rate of change in the temperature rise rate of the sliding parts of the bearings or the like may become positive when the molding device is started up. Furthermore, in a conventional configuration where the temperature of bearings, etc. and the rate of temperature rise are monitored to determine whether an abnormality has occurred, the temperature of the bearings, etc. changes depending on the season and whether it is morning or evening or daytime (i.e., the time of day), and also changes depending on the ambient temperature of the molding device and the production conditions of the molding device (cycle time, etc.).

[0005] When determining whether or not an abnormality has occurred in a part such as a bearing based on the temperature of the part, a threshold value is often set for the temperature, and the determination is made based on whether or not the temperature exceeds the threshold value. However, as described above, it is not easy to take into account all of the seasons, daily temperature changes, ambient temperature, production conditions of the molding equipment, etc., and set the threshold value as a function of these factors. Furthermore, it is difficult to say that a threshold value as such a function can always accurately determine whether or not an abnormality has occurred.

[0006] The present invention has been made in consideration of the above points, and aims to provide an abnormality monitoring system and a molding device that can easily and accurately monitor abnormalities in parts such as bearings of a molding device. [Means for solving the problem]

[0007] Anomaly monitoring system according to the present invention M is , Forging Press Equipment If there is no abnormality in the plurality of components, Forging Press Equipment a measuring device that measures parameters representing the states of a plurality of components, each of which has a state that changes in the same way as each other in response to the operation of the a monitoring device that monitors abnormalities in the plurality of components; Equipped with the plurality of parts is a plurality of bearings, and the component is a lubricant for the plurality of bearings; the measuring device measures a temperature rise in each of the plurality of bearings as a parameter representing the state based on a difference between a temperature of the lubricating oil discharged from each of the plurality of bearings and a temperature of the lubricating oil supplied to the bearing; The monitoring device monitors abnormalities of the plurality of components based on differences in the parameters representing the states corresponding to the plurality of components, which are measured by the measuring device. The molding device according to the present invention comprises: The forging press is equipped with the abnormality monitoring system described above. [Effects of the Invention]

[0008] According to the present invention, it is possible to easily and accurately monitor abnormalities in parts such as bearings of a molding device. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a molding device according to an embodiment of the present invention. [Figure 2] (a) is a graph showing an example of the change in lubricating oil temperature when there is no abnormality in the bearing, and (b) is a graph showing an example of the change in lubricating oil temperature when the ambient temperature of the molding device is low. [Figure 3] (a) is a graph showing an example of the change in lubricating oil temperature when an abnormality occurs in the bearing, and (b) is a graph showing an example of the change in lubricating oil temperature when the ambient temperature of the molding device is low, etc. [Figure 4] 10 is a graph showing an example in which one of the temperatures of two bearings changes so as to be originally higher by a predetermined value than the other. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An abnormality monitoring system and a molding device according to embodiments of the present invention will be described below with reference to the drawings. In the following, we will explain the case where the molding device of this embodiment is a forging press device (a forging press device with a flywheel) as an example, but the present invention can be applied to any type of molding device, such as a press device or an injection molding device.

[0011] FIG. 1 is a diagram showing an example of the configuration of a molding device according to this embodiment. The molding device 10 includes a bed 11, an upright 12, a crown 13, a bed hard plate 15, a slide 17, a drive unit 20, and the like.

[0012] The bed 11, the upright 12, and the crown 13 constitute the frame of the molding device 10. Tie rods 14a are inserted into the bed 11, the upright 12, and the crown 13, and are fastened together by being tightened with tie rod nuts 14b. The bed hard plate 15 is fixed on the bed 11, and a lower mold 16 is fixed on the upper part of the bed hard plate 15.

[0013] The slide 17 is supported by a slide guide 19 provided on the upright 12 so as to be movable up and down. An upper die 18 is fixed to the lower part of the slide 17. When the slide 17 descends, the upper die 18 and the lower die 16 approach each other, and an object to be forged (not shown) is forged between them. The direction in which the slide 17 moves (press direction) is not limited to the up and down direction and is not particularly limited.

[0014] The drive unit 20 is a mechanism for moving the slide 17, and is configured with a motor 21, a flywheel 22, a clutch 23, a transmission shaft 24, a reducer 25, an eccentric shaft 26, a connecting rod (connecting rod) 28, etc.

[0015] The motor 21 is fixed to one end of a frame such as the crown 13. The power of the motor 21 is transmitted to the flywheel 22 via a belt 21a, causing the flywheel 22 to rotate. The flywheel 22 is rotatably supported and stores rotational energy.

[0016] The clutch 23 is disposed near the flywheel 22 and is fixed to one axial end of the transmission shaft 24. The clutch 23 connects and disconnects the flywheel 22 and the transmission shaft 24 to rotate the transmission shaft 24. The transmission shaft 24 rotates around a central rotation axis Ax, and transmits the rotational motion of the flywheel 22 to a reducer 25 provided on the other end side of the frame. The reducer 25 reduces the speed of the rotational motion of the transmission shaft 24 and transmits it to the eccentric shaft 26 .

[0017] The eccentric shaft 26 is rotatably supported by a frame such as the crown 13 or the upright 12 via a bearing (eccentric shaft main bearing) 27 . The eccentric shaft 26 has a hollow portion that passes through along the central axis of rotation Ax, and the transmission shaft 24 is arranged within this hollow portion so as to be rotatable relative to the eccentric shaft 26 and coaxial with the central axis of rotation of the eccentric shaft 26.

[0018] The connecting rod 28 is attached to the eccentric portion of the eccentric shaft 26 in a direction perpendicular to the rotation center axis Ax of the eccentric shaft 26, and the slide 17 is attached to the lower end thereof. The rotational motion of the eccentric shaft 26 is converted into linear motion and transmitted to the slide 17, thereby moving the slide 17 in the vertical direction (press direction).

[0019] Next, the abnormality monitoring system according to this embodiment will be described. The abnormality monitoring system 1 includes a measuring device that measures parameters representing the state of a plurality of components that correspond to a plurality of parts of the molding device 10 and that have states that change in the same way as each other depending on the operation of the molding device 10 when no abnormalities occur in the plurality of parts, and a monitoring device 40 that monitors abnormalities in a plurality of parts of the molding device 10 that correspond to the plurality of components based on differences in the parameters measured by the measuring device.

[0020] The monitoring device 40 is configured as a computer, a dedicated device, etc. It may also be a portable device such as a personal digital assistant. Furthermore, the constituent elements of the molding device 10 may be parts of the molding device 10, but do not necessarily have to be parts of the molding device 10, such as lubricating oil, which will be described later. Furthermore, the part of the molding device 10 corresponding to the component refers to the part itself if the component is a part of the molding device 10, and refers to the part for which the component is used if the component is not a part of the molding device 10.

[0021] In the following, an example will be explained in which the part of the molding device 10 is the bearing 27 of the eccentric shaft 26, the component is the lubricating oil of the bearing 27, the parameter representing the state is the temperature T of the lubricating oil, and the measuring device is a thermometer. In the following description, the bearing 27 closer to the reducer 25 will be referred to as bearing 27A, and the bearing 27 closer to the flywheel 22 will be referred to as bearing 27B. Furthermore, the symbols related to the bearings 27A and 27B will be marked with A and B, respectively, to distinguish them from one another.

[0022] As shown in FIG. 1, the molding device 10 is provided with supply pipes 31A and 31B for supplying lubricating oil 30A and 30B to the bearings 27A and 27B, respectively, and discharge pipes 32A and 32B for discharging the lubricating oil 30A and 30B from the bearings 27A and 27B, respectively. Lubricating oils 30A and 30B are supplied to bearings 27A and 27B through supply pipes 31A and 31B, respectively, and after lubricating bearings 27A and 27B, are discharged through discharge pipes 32A and 32B.

[0023] Thermometers 33A and 33B are attached to the supply pipes 31A and 31B, respectively, as measuring devices for measuring temperatures TinA and TinB of the lubricating oils 30A and 30B flowing through the supply pipes 31A and 31B. Further, thermometers 34A and 34B are attached to the discharge pipes 32A and 32B, respectively, as measuring devices for measuring temperatures ToutA and ToutB of the lubricating oils 30A and 30B flowing through the discharge pipes 32A and 32B.

[0024] In addition, thermometers 35A and 35B are installed as measuring devices to measure the temperatures TA and TB of the lubricating oil 30A and 30B in the bearings 27A and 27B (i.e., the lubricating oil 30A and 30B present between the bearings 27A and 27B and the eccentric shaft 26). When these thermometers measure the respective temperatures in accordance with instructions from the monitoring device 40, they transmit the measured temperatures to the monitoring device 40.

[0025] Although FIG. 1 shows that only the thermometer 34A is connected to the monitoring device 40, in reality, each of the thermometers described above is connected to the monitoring device 40. Furthermore, it is not necessary to attach thermometers to all of the supply pipes 31A and 31B, the discharge pipes 32A and 32B, and the bearings 27A and 27B, but it is sufficient to attach them to necessary locations.

[0026] On the other hand, for example, the temperature TA of the lubricating oil 30A of the bearing 27A of the eccentric shaft 26 and the temperature TB of the lubricating oil 30B of the bearing 27B change in the same manner according to the operation of the molding device 10, as shown in Figure 2(a), when there is no abnormality in the bearings 27A and 27B. Furthermore, even if the ambient temperature of the molding device 10 is low or the cycle time of the molding device 10 is long, if there is no abnormality in the bearings 27A and 27B, as shown in Figure 2(b), the temperatures TA and TB will both be lower than in the case of Figure 2(a), but will change in the same way depending on the operation of the molding device 10.

[0027] 2(a) and (b) illustrate a case in which the temperatures TA and TB change (in this case, increase) according to the elapsed time t from when the molding device 10 starts operating (see ON in the figure) and the eccentric shaft 26 starts rotating around the rotation center axis Ax. Although not shown, once bearing 27A reaches a state of equilibrium and the temperature TA of lubricating oil 30A becomes constant, bearing 27B also reaches a state of equilibrium and the temperature TB of lubricating oil 30B becomes constant.

[0028] Furthermore, this phenomenon in which the temperatures of lubricating oil 30A in bearing 27A of eccentric shaft 26 and lubricating oil 30B in bearing 27B change in the same way (including when they become constant) also occurs in temperatures TinA and TinB of lubricating oil 30A and 30B in supply pipes 31A and 31B and temperatures ToutA and ToutB of lubricating oil 30A and 30B in discharge pipes 32A and 32B, provided that there is no abnormality in bearings 27A and 27B.

[0029] In this way, the temperatures of the lubricating oil 30A for the bearing 27A of the eccentric shaft 26 and the lubricating oil 30B for the bearing 27B change in the same manner as the molding apparatus 10 operates, provided that there is no abnormality in the bearings 27A and 27B. Conversely, if there is a significant difference between the temperature TA, etc. of the lubricating oil 30A in the bearing 27A of the eccentric shaft 26 and the temperature TB, etc. of the lubricating oil 30B in the bearing 27B, it can be determined that an abnormality has occurred in the bearings 27A, 27B (components) corresponding to the lubricating oils 30A, 30B (components).

[0030] In the abnormality monitoring system 1 of this embodiment, when there is no abnormality in the bearings 27A, 27B of the molding device 10, the temperatures of the lubricating oils 30A, 30B (lubricating oils 30A, 30B correspond to bearings 27A, 27B, respectively) change in state in the same way depending on the operation of the molding device 10, and the abnormality in the bearings 27A, 27B is monitored by measuring the temperatures of the lubricating oils 30A, 30B, and determining whether or not there is an abnormality in the bearings 27A, 27B depending on whether or not there is a significant difference in the measured temperatures of the lubricating oils 30A, 30B. Hereinafter, a method for determining whether or not an abnormality has occurred in the bearings 27A, 27B (components) based on the temperature (parameter representing the state) of the lubricating oils 30A, 30B (components) will be described with some configuration examples.

[0031] In addition, when the monitoring device 40 determines that an abnormality has occurred in a part of the molding device 10, such as bearings 27A, 27B, the monitoring device 40 can be configured to notify the user that an abnormality has occurred in the part by displaying the abnormality on the display screen 41 (see Figure 1), generating a sound from the speaker 42, or vibrating the portable monitoring device 40. This configuration allows the user to replace the malfunctioning part, thereby preventing serious malfunctions such as burning of the part.

[0032] [Configuration example 1] The monitoring device 40 can be configured to monitor abnormalities in parts by determining whether an abnormality has occurred in a part of the molding device 10 corresponding to the component based on whether the difference in parameters representing the state of multiple components is greater than or equal to a threshold value. That is, in the above example, the monitoring device 40 can be configured to monitor abnormalities in the bearings 27A and 27B by determining whether an abnormality has occurred in the bearing 27A or the bearing 27B of the eccentric shaft 26 corresponding to the lubricating oils 30A and 30B depending on whether the temperature difference between the lubricating oils 30A and 30B is greater than or equal to a threshold value.

[0033] [Configuration Example 1-1] For example, the temperatures TA and TB of the lubricating oils 30A and 30B in the bearings 27A and 27B (i.e., the lubricating oils 30A and 30B present between the bearings 27A and 27B and the eccentric shaft 26) can be used as the temperatures of the lubricating oils 30A and 30B. In this case, every time the information on the temperatures TA and TB is transmitted from the thermometers 35A and 35B that measure the temperatures TA and TB of the lubricating oils 30A and 30B in the bearings 27A and 27B, the monitoring device 40 detects the difference between the temperatures TA and TB. ΔT = TA - TB … (1) Calculate.

[0034] If there is no abnormality in either bearing 27A or 27B, the temperatures TA and TB of lubricating oils 30A and 30B will change in the same way depending on the operation of molding device 10, as shown in Figures 2(a) and (b), and the absolute value of the difference ΔT between them will be 0 or a small positive value. At this time, the temperatures TA and TB of the lubricating oils 30A and 30B themselves will rise or fall as shown in Figures 2(a) and (b) depending on the temperature around the molding device 10 and the length of the cycle time in the molding device 10, but they will change in the same way depending on the operation of the molding device 10.

[0035] Therefore, whether the temperatures TA and TB of the lubricating oils 30A and 30B themselves are high or low, the absolute value of the difference ΔT therebetween is 0 or a small positive value. As described above, when we focus on the difference ΔT (= TA - TB) between the temperatures TA and TB of the lubricating oils 30A and 30B of the bearings 27A and 27B, the absolute value of the difference ΔT is 0 or a small positive value unless there is an abnormality in either the bearings 27A or 27B, regardless of the temperature around the molding device 10 or the length of the cycle time in the molding device 10.

[0036] On the other hand, for example, if an abnormality occurs in bearing 27B, the temperature TB of lubricating oil 30B of bearing 27B will change to rise significantly as the molding device 10 operates, compared to the temperature TA of lubricating oil 30A of bearing 27A, as shown in Figure 3(a). Therefore, the absolute value of the difference ΔT (=TA-TB) between them becomes a large positive value.

[0037] In this case too, the temperatures TA and TB of the lubricating oils 30A and 30B themselves will rise or fall as shown in Figures 3(a) and (b) depending on the ambient temperature of the molding device 10 and the length of the cycle time in the molding device 10, but if an abnormality occurs in bearing 27B, for example, the temperature TB of the lubricating oil 30B in bearing 27B will still rise significantly compared to the temperature TA of the lubricating oil 30A in bearing 27A as the molding device 10 operates.

[0038] Therefore, when the temperature difference ΔT between the temperatures TA and TB of the lubricating oils 30A and 30B is calculated, whether they are high or low, if an abnormality occurs in either the bearing 27A or 27B, the absolute value of the difference ΔT will be a large positive value. As described above, when we focus on the difference ΔT (= TA - TB) between the temperatures TA and TB of the lubricating oils 30A and 30B of the bearings 27A and 27B, regardless of the temperature around the molding device 10 or the length of the cycle time in the molding device 10, if an abnormality occurs in either of the bearings 27A and 27B, the absolute value of the difference ΔT will be a large positive value.

[0039] Therefore, the monitoring device 40 can accurately determine whether an abnormality has occurred in the bearing 27A or bearing 27B of the eccentric shaft 26 corresponding to the lubricating oil 30A, 30B depending on whether the absolute value of the difference ΔT (= TA - TB) between the temperatures TA and TB of the lubricating oil 30A, 30B in the bearing 27A, 27B portion is greater than or equal to the threshold value ΔTth.

[0040] When an abnormality occurs in bearing 27, the temperature T of lubricating oil 30 usually rises. Therefore, if the absolute value of the difference ΔT between the temperatures TA and TB of lubricating oil 30A, 30B in the bearings 27A, 27B is equal to or greater than threshold value ΔTth and it is determined that an abnormality has occurred in either bearing 27A or bearing 27B, the monitoring device 40 can be configured to determine that an abnormality has occurred in the bearing 27 with the higher temperature T.

[0041] The threshold value ΔTth is set to a value that can appropriately distinguish between a case where an abnormality occurs in the bearing 27 and a case where no abnormality occurs. Furthermore, as shown in FIG. 4, depending on the structure of the molding apparatus 10, the environment in which it is used, and other factors, one of the temperatures TA and TB of the bearings 27A and 27B may change so as to be originally higher than the other by a predetermined value α.

[0042] Furthermore, there are cases where the predetermined value α changes as the time t elapses after the molding device 10 starts operating (see ON in the figure) (that is, there are cases where the predetermined value α is expressed as a function of the elapsed time t). However, it is necessary to avoid erroneously determining that an abnormality has occurred in either bearing 27A or 27B when no abnormality has occurred in bearing 27A or 27B due to a difference of a predetermined value α between the temperatures TA and TB of bearing 27A and 27B.

[0043] In such a case, for example, as shown by the broken line in FIG. 4, the difference ΔT between the value T+α obtained by adding a predetermined value α to the lower temperature T (temperature TA in the example of FIG. 4) and the higher temperature T (temperature TB in the example of FIG. 4) is * Calculate the difference ΔT * It is also possible to configure the system so as to determine whether or not the difference is equal to or greater than a threshold value ΔTth. With this configuration, even if there is no abnormality in bearings 27A, 27B, if one of temperatures TA, TB of bearings 27A, 27B changes to be larger by a predetermined value α than the other, it becomes possible to accurately determine whether or not an abnormality has occurred in bearings 27A, 27B.

[0044] [Configuration example 1-2] In addition, instead of using the temperatures TA and TB of the lubricating oil 30A and 30B in the bearings 27A and 27B (i.e., the lubricating oil 30A and 30B present between the bearings 27A and 27B and the eccentric shaft 26) as the temperatures of the lubricating oil 30A and 30B as described above, it is also possible to configure the apparatus to use the temperatures ToutA and ToutB of the lubricating oil 30A and 30B in the discharge pipes 32A and 32B measured by the thermometers 34A and 34B.

[0045] In this case, the temperatures ToutA and ToutB of the lubricating oils 30A and 30B in the discharge pipes 32A and 32B reflect the temperatures TA and TB of the lubricating oils 30A and 30B in the bearings 27A and 27B. ΔTout = ToutA - ToutB … (2) can be calculated and used instead of the difference ΔT above. Then, similarly to the above-described configuration example 1-1, it becomes possible to accurately determine whether or not an abnormality has occurred in the bearings 27A, 27B depending on whether or not the difference ΔTout is equal to or greater than the threshold value ΔTout_th.

[0046] [Configuration Example 1-3] Furthermore, instead of using the temperatures ToutA and ToutB of the lubricating oil 30A and 30B in the discharge pipes 32A and 32B as described above as the temperatures of the lubricating oil 30A and 30B, it is also possible to use the temperature rise ToutA-TinA and ToutB-TinB of the lubricating oil 30A and 30B in the bearings 27A and 27B, which are calculated by subtracting the temperatures TinA and TinB of the lubricating oil 30A and 30B in the supply pipes 31A and 31B from the temperatures ToutA and ToutB of the lubricating oil 30A and 30B in the discharge pipes 32A and 32B, respectively.

[0047] In this case, the temperature increases ToutA-TinA and ToutB-TinB correspond to the temperature increases of the lubricating oils 30A and 30B that have been heated at the bearings 27A and 27B, so by calculating the temperature increases ToutA-TinA and ToutB-TinB, it is possible to accurately determine the extent to which the lubricating oils 30A and 30B have been heated at the bearings 27A and 27B (i.e., whether they have been heated abnormally).

[0048] Therefore, the difference between the temperature rises of the lubricating oils 30A and 30B in the bearings 27A and 27B, ToutA-TinA and ToutB-TinB, ΔTout-in=(ToutA-TinA)-(ToutB-TinB)…(3) is calculated and used instead of the above-mentioned difference ΔT or difference ΔTout, and by determining whether the difference ΔTout-in is equal to or greater than the threshold value ΔTout-in_th, it becomes possible to accurately determine whether an abnormality has occurred in the bearings 27A, 27B.

[0049] In addition, it is also possible to monitor the temperatures TA and TB of the lubricating oil 30A and 30B in the aforementioned bearings 27A and 27B themselves (in the case of configuration example 1-1), the temperatures ToutA and ToutB of the lubricating oil 30A and 30B in the discharge pipes 32A and 32B themselves (in the case of configuration example 1-2), or the temperature rises ToutA-TinA and ToutB-TinB of the lubricating oil 30A and 30B in the bearings 27A and 27B themselves (in the case of configuration example 1-3), and if these values exceed the allowable values, the monitoring device 40 can be configured to alert the user that an abnormality has occurred in bearing 27A, bearing 27B, or both. With this configuration, it is possible to more reliably notify the user of abnormalities in the bearings 27A and 27B.

[0050] [Configuration example 2] On the other hand, the monitoring device 40 can also be configured to monitor abnormalities in parts by determining whether an abnormality has occurred in a part of the molding device 10 corresponding to the component in question based on whether the difference in the rate of change of the parameter representing the state of the multiple components is greater than or equal to a threshold value, instead of the difference in the parameter representing the state of the multiple components. In other words, in the above example, the monitoring device 40 can be configured to monitor abnormalities in bearings 27A and 27B by determining whether an abnormality has occurred in bearing 27A or bearing 27B of the eccentric shaft 26 corresponding to lubricating oil 30A, 30B based on whether the difference in the rate of change (rate of increase) of the temperature of lubricating oil 30A, 30B is greater than or equal to a threshold value.

[0051] [Configuration Example 2-1] For example, in the above configuration example 1-1, it is possible to use the change rates dTA / dt and dTB / dt of the temperatures TA and TB of the lubricating oil 30A and 30B in the bearings 27A and 27B (i.e., the lubricating oil 30A and 30B present between the bearings 27A and 27B and the eccentric shaft 26) instead of the temperatures TA and TB themselves.

[0052] That is, each time temperature information TA and TB is transmitted from the thermometer that measured the temperatures TA and TB of the lubricating oil 30A and 30B in the bearings 27A and 27B, the monitoring device 40 calculates the temperature differences dTA=TA-TAold and dTB=TB-TBold between these and the TA (referred to as TAold) and TB (referred to as TBold) transmitted from the thermometers 35A and 35B at the previous measurement timing, and divides these by the measurement interval dt to calculate the temperature change rates dTA / dt and dTB / dt. And the difference between those rates of change ΔdT / dt=dTA / dt-dTB / dt …(4) Calculate.

[0053] If there is no abnormality in either bearing 27A or 27B, the temperatures TA and TB of lubricating oil 30A and 30B will change in the same way depending on the operation of molding device 10, as shown in Figures 2(a) and (b), and the absolute value of the difference in the temperature change rate ΔdT / dt will be 0 or a small positive value. In the graphs of the temperatures TA, TB, etc., the change rates dTA / dt, dTB / dt, etc. of the temperatures TA, TB, etc. are expressed as the gradients of the tangents to the graphs of the temperatures TA, TB, etc.

[0054] The temperatures TA and TB of the lubricating oils 30A and 30B themselves will rise or fall as shown in Figures 2(a) and (b) depending on the temperature around the molding device 10 and the length of the cycle time in the molding device 10, but they will change in the same way depending on the operation of the molding device 10. Therefore, whether the temperatures TA and TB of the lubricating oils 30A and 30B themselves are high or low, the absolute value of the difference in the rate of change of the temperatures ΔdT / dt is 0 or a small positive value.

[0055] As described above, when we focus on the difference ΔdT / dt in the rate of change of the temperatures TA and TB of the lubricating oils 30A and 30B of the bearings 27A and 27B, the absolute value of the difference ΔdT / dt in the rate of change of the temperatures will be 0 or a small positive value unless there is an abnormality in either the bearings 27A or 27B, regardless of the temperature around the molding device 10 or the cycle time of the molding device 10.

[0056] On the other hand, for example, if an abnormality occurs in bearing 27B, the temperature TB of lubricating oil 30B of bearing 27B will change to rise significantly as the molding device 10 operates, compared to the temperature TA of lubricating oil 30A of bearing 27A, as shown in Figure 3(a). Therefore, the absolute value of the difference ΔdT / dt (=dTA / dt−dTB / dt) between the change rates of the temperatures TA and TB becomes a large positive value.

[0057] In this case too, the temperatures TA and TB of the lubricating oils 30A and 30B themselves will rise or fall as shown in Figures 3(a) and (b) depending on the ambient temperature of the molding device 10 and the length of the cycle time in the molding device 10, but if an abnormality occurs in bearing 27B, for example, the temperature TB of the lubricating oil 30B in bearing 27B will still rise significantly compared to the temperature TA of the lubricating oil 30A in bearing 27A as the molding device 10 operates.

[0058] Therefore, when the difference ΔdT / dt in the rate of change of the temperatures TA and TB of the lubricating oils 30A and 30B is calculated, whether the temperatures TA and TB themselves are high or low, if an abnormality occurs in either of the bearings 27A and 27B, the absolute value of the difference ΔdT / dt in the rate of change of the temperatures will be a large positive value. As described above, when we focus on the difference ΔdT / dt (= dTA / dt - dTB / dt) in the rate of change of the temperatures TA and TB of the lubricating oils 30A and 30B of the bearings 27A and 27B, regardless of the ambient temperature of the molding device 10 or the length of the cycle time of the molding device 10, if an abnormality occurs in either of the bearings 27A and 27B, the absolute value of the difference ΔdT / dt in the rate of change of the temperatures becomes a large positive value.

[0059] Therefore, the monitoring device 40 can accurately determine whether an abnormality has occurred in the bearing 27A or bearing 27B of the eccentric shaft 26 corresponding to the lubricating oil 30A, 30B based on whether the absolute value of the difference ΔdT / dt (= dTA / dt - dTB / dt) in the rate of change of the temperatures TA, TB of the lubricating oil 30A, 30B in the bearing 27A, 27B portion is greater than or equal to the threshold value ΔdT / dtth.

[0060] When an abnormality occurs in bearing 27, the temperature T of lubricating oil 30 usually rises. Therefore, if the absolute value of the difference ΔdT / dt in the rate of change of temperatures TA, TB of lubricating oil 30A, 30B in the bearings 27A, 27B is equal to or greater than threshold value ΔdT / dtth, and it is determined that an abnormality has occurred in either bearing 27A or bearing 27B, the monitoring device 40 can be configured to determine that an abnormality has occurred in the bearing 27 with the higher temperature T.

[0061] [Configuration Example 2-2] In addition, instead of using the temperatures TA and TB of the lubricating oil 30A and 30B in the bearings 27A and 27B (i.e., the lubricating oil 30A and 30B present between the bearings 27A and 27B and the eccentric shaft 26) as the temperatures of the lubricating oil 30A and 30B as described above, it is also possible to configure the apparatus to use the temperatures ToutA and ToutB of the lubricating oil 30A and 30B in the discharge pipes 32A and 32B measured by the thermometers 34A and 34B.

[0062] In this case, the temperatures ToutA and ToutB of the lubricating oil 30A and 30B in the discharge pipes 32A and 32B reflect the temperatures TA and TB of the lubricating oil 30A and 30B in the bearings 27A and 27B, and therefore the rates of change dToutA / dt and dToutB / dt of the temperatures ToutA and ToutB are also considered to reflect the rates of change dTA / dt and dTB / dt of the temperatures TA and TB mentioned above. Therefore, the difference between the change rates dToutA / dt and dToutB / dt of temperatures ToutA and ToutB ΔdTout / dt=dToutA / dt-dToutB / dt …(5) can be calculated and used instead of the above difference ΔdT / dt. Then, similarly to the above configuration example 2-1, it becomes possible to accurately determine whether or not an abnormality has occurred in the bearings 27A, 27B depending on whether or not the difference in the rate of change of temperature ΔdTout / dt is equal to or greater than the threshold value ΔdTout / dtth.

[0063] [Configuration example 2-3] Furthermore, instead of using the temperatures ToutA and ToutB of the lubricating oil 30A and 30B in the discharge pipes 32A and 32B as described above as the temperatures of the lubricating oil 30A and 30B, it is also possible to use the temperature rise ToutA-TinA and ToutB-TinB of the lubricating oil 30A and 30B in the bearings 27A and 27B, which are calculated by subtracting the temperatures TinA and TinB of the lubricating oil 30A and 30B in the supply pipes 31A and 31B from the temperatures ToutA and ToutB of the lubricating oil 30A and 30B in the discharge pipes 32A and 32B, respectively.

[0064] In this case, the temperature increases ToutA-TinA and ToutB-TinB correspond to the temperature increases of the lubricating oils 30A and 30B heated at the bearings 27A and 27B, so by calculating the change rates d(ToutA-TinA) / dt and d(ToutB-TinB) / dt of the temperature increases ToutA-TinA and ToutB-TinB, it is possible to accurately determine the change rate of the temperature of the lubricating oils 30A and 30B heated at the bearings 27A and 27B (i.e., whether they are being heated abnormally).

[0065] Therefore, the difference between the change rates d(ToutA-TinA) / dt and d(ToutB-TinB) / dt of the temperature rises ToutA-TinA and ToutB-TinB of the lubricating oils 30A and 30B in the bearings 27A and 27B ΔdTout-in / dt=d(ToutA-TinA) / dt-d(ToutB-TinB) / dt…(6) By calculating the difference in the temperature change rates ΔdTout-in / dt and determining whether the difference in the temperature change rates ΔdTout-in / dt is equal to or greater than the threshold value ΔdTout-in / dtth, it is possible to accurately determine whether an abnormality has occurred in the bearings 27A, 27B.

[0066] In addition, it is also possible to monitor the values of the change rates dTA / dt, dTB / dt of the temperatures TA, TB of the lubricating oil 30A, 30B in the aforementioned bearings 27A, 27B (in the case of configuration example 2-1), the change rates dToutA / dt, dToutB / dt of the temperatures ToutA, ToutB of the lubricating oil 30A, 30B in the discharge pipes 32A, 32B (in the case of configuration example 2-2), or the change rates d(ToutA-TinA) / dt, d(ToutB-TinB) / dt of the temperature rise ToutA-TinA, ToutB-TinB of the lubricating oil 30A, 30B in the bearings 27A, 27B (in the case of configuration example 2-3), and if the value exceeds the allowable value, the monitoring device 40 can be configured to alert the user that an abnormality has occurred in bearing 27A, bearing 27B, or both.

[0067] With this configuration, it is possible to more reliably notify the user of abnormalities in the bearings 27A and 27B. Moreover, by appropriately combining the above-described configuration examples 1-1 to 2-3, it is possible to configure the device so that it is possible to more accurately determine whether or not an abnormality has occurred in the bearings 27A and 27B.

[0068] As described above, according to the abnormality monitoring system 1 and molding apparatus 10 of this embodiment, the monitoring device 40 monitors abnormalities in multiple components (e.g., lubricating oils 30A, 30B) of the molding apparatus 10 that correspond to multiple components (e.g., bearings 27A, 27B of the eccentric shaft 26) of the molding apparatus 10, respectively, and that have states that change in the same way depending on the operation of the molding apparatus 10 when no abnormalities have occurred in the multiple components, based on the difference in parameters (e.g., temperature) that represent the state of the components measured respectively.

[0069] As in the conventional method described above, when monitoring abnormalities in bearings 27A, 27B (components) based on the temperature (parameter representing the condition) of lubricating oils 30A, 30B (components) themselves, it is difficult to say that it is always possible to accurately determine whether or not an abnormality has occurred in bearings 27A, 27B, because the temperature of lubricating oils 30A, 30B changes depending on the season, time of day, the ambient temperature of molding device 10, the production conditions of molding device 10 (cycle time, etc.), etc.

[0070] In contrast, the abnormality monitoring system 1 and molding device 10 of this embodiment monitors abnormalities in bearings 27A and 27B (components) based on the temperature difference obtained by measuring the temperatures (parameters representing the state) of lubricating oils 30A and 30B (components) whose temperatures (states) change in the same way. Therefore, even if the temperatures of the lubricating oils 30A and 30B themselves rise and fall depending on the season, time of day, etc., calculating the difference between them as described above offsets the effects of the season, time of day, etc. Therefore, the abnormality monitoring system 1 and molding device 10 according to this embodiment make it possible to accurately determine whether or not an abnormality has occurred in the bearings 27A and 27B (components) without being affected by the season, time of day, etc., and accurately monitor the abnormalities in the bearings 27A and 27B (components).

[0071] Furthermore, in the abnormality monitoring system 1 and molding apparatus 10 of this embodiment, it is possible to monitor abnormalities in the bearings 27A and 27B (components) based on the difference between the temperatures (parameters representing the state) of the lubricating oils 30A and 30B (components) simply by measuring them with a thermometer (measuring device). Therefore, it is possible to easily determine whether or not an abnormality has occurred in the components such as the bearings 27A and 27B of the molding device 10, and easily monitor the abnormality of the bearings 27A and 27B (components).

[0072] In the above embodiment, the parts of the molding device 10 are the bearings 27A and 27B of the eccentric shaft 26, the components are the lubricating oils 30A and 30B of the bearings 27A and 27B, and the parameters representing the state are the temperatures TA and TB of the lubricating oils 30A and 30B. However, the application of the present invention is not limited to this case.

[0073] For example, although not shown in FIG. 1, there are bearings between the eccentric shaft 26 and the two connecting rods 28, and lubricating oil is supplied to and discharged from these bearings. Furthermore, the lubricating oils for these bearings will change in temperature in the same way as each other depending on the operation of the molding device 10 unless there is an abnormality in each bearing, so these bearings and lubricating oils can be treated in the same way as the bearings 27A, 27B and lubricating oils 30A, 30B in the above embodiment, and the system can be configured to accurately monitor abnormalities in each bearing.

[0074] Furthermore, for example, although not shown in the figures, there is a type of molding device in which an eccentric shaft or the like is rotated by a servo motor attached to each end of the eccentric shaft or the like, and the bearings in these servo motors also change in temperature in the same manner as the molding device 10 operates, provided that there is no abnormality in the bearings. Therefore, the bearings and lubricating oils of these servo motors can be treated in the same manner as the bearings 27A, 27B and lubricating oils 30A, 30B in the above embodiment, and abnormalities in the bearings can be monitored.

[0075] Furthermore, instead of monitoring bearing abnormalities based on the temperature of the lubricating oil as in the above embodiment, it is also possible to configure the system so that bearing abnormalities are monitored based on the temperature of the bearing itself. Furthermore, the components are not limited to bearings, and the number of components or parts may be three or more.

[0076] For example, a total of four slide guides 19 (see FIG. 1) that support the slides 17 are provided on the front, rear, left, and right uprights 12, and each slides relative to the uprights 12. Therefore, as the temperature of the slide guides 19 rises as the molding device 10 operates, lubricating oil is supplied between the slide guides 19 and the uprights 12. If no abnormality occurs in each slide guide 19, their temperatures change in the same way in response to the operation of the molding device 10. Therefore, these slide guides 19 and lubricating oil can be treated in the same way as the bearings 27A, 27B and lubricating oils 30A, 30B in the above embodiment, and a configuration can be made in which abnormalities in each slide guide 19 are monitored.

[0077] In this case, it is possible to configure the system so that the difference between the measured temperatures is calculated as the difference between the temperature of each slide guide 19 (or the temperature of the corresponding lubricating oil; the same applies below) and the average temperature of the four slide guides 19. Alternatively, the difference between the temperature of each slide guide 19 and the average temperature of the other three slide guides 19 may be calculated.

[0078] Furthermore, for example, in a press machine equipped with a product transfer device (not shown), the workpiece is fixed and lifted, and the four clamping ball screw bearings and four lifting ball screw bearings used in this process (front, rear, left and right) can be configured to be monitored for abnormalities in the same manner as described above. In this way, with the abnormality monitoring system 1 and molding apparatus 10 of the present invention, when multiple components of the molding apparatus 10 (including cases where the components are parts themselves; the same applies below) change temperature in the same way as each other depending on the operation of the molding apparatus, it is possible to accurately monitor abnormalities in each part of the molding apparatus based on the difference in the measured temperatures of the components.

[0079] In addition, in the above embodiments, the parameters representing the state of multiple components are described as the temperature of the lubricating oil or parts (bearings, etc.), but the parameters may also be other parameters, such as the vibrations occurring in each part, such as the magnitude of vibration (e.g., maximum amplitude, maximum speed, maximum acceleration, etc.) of each bearing 27A, 27B of the eccentric shaft 26 when the molding device 10 is operating. In this case, the measuring device would be, for example, a vibrometer.

[0080] Furthermore, when the bearings 27A, 27B, the slide guide 19, etc. wear, the amount of iron contained in the discharged lubricating oil may increase. Therefore, for example, it is possible to use the amount of iron contained in the lubricating oil as a parameter representing the state of multiple components, and use an iron meter (see JP 2003-35397 A, etc.) as a measuring device to monitor abnormalities in each of multiple components based on the amount of iron contained in the lubricating oil discharged.

[0081] Furthermore, for example, in a molding device of the type described above in which an eccentric shaft or the like is rotated by servo motors attached to both ends of the eccentric shaft or the like, if an abnormality occurs in one of the servo motors, the amount of current flowing through that servo motor may increase. Therefore, for example, it is possible to use the amount of current flowing through each servo motor as a parameter representing the state of multiple components, and use an ammeter as a measuring device to monitor abnormalities in each servo motor based on the amount of current flowing through each servo motor.

[0082] It goes without saying that the present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. For example, in the above embodiments, the case where the difference in the parameters representing the state or the difference in the rate of change of the parameters representing the state is used has been described. However, it is also possible to configure the configuration so as to use, for example, the difference in the rate of change of the rate of change of the parameters representing the state (i.e., the second derivative of the parameters). [Explanation of symbols]

[0083] 1. Anomaly monitoring system 10 Molding equipment 27A, 27B Bearings (Parts, Bearings) 30A, 30B Lubricating oil (component, lubricating oil) 31A, 31B supply pipe 32A, 32B discharge pipe 33A, 33B Thermometer (measuring device, thermometer) 34A, 34B Thermometer (measuring device, thermometer) 35A, 35B Thermometer (measuring device, thermometer) 40 Monitoring equipment TA, TB Temperature (parameter indicating the condition, temperature of the lubricating oil in the bearing area) TinA, TinB temperature (parameter representing the state, temperature) ToutA, ToutB temperature (parameter representing the state, temperature) TinA-ToutA, TinB-ToutB Temperature rise of lubricating oil in bearing ΔdT / dt difference ΔdTout / dt difference ΔdTout-in / dt difference ΔdT / dtth threshold ΔdTout / dtth threshold ΔdTout-in / dtth threshold ΔT difference ΔTout difference ΔTout-in difference ΔTth threshold ΔTout_th threshold ΔTout-in_th threshold

Claims

1. A measuring device that measures parameters representing the states of a plurality of components, each corresponding to a plurality of parts of a forging press device, and each of which has a state that changes in the same way as each other depending on the operation of the forging press device when there is no abnormality in the plurality of parts; a monitoring device that monitors abnormalities in the plurality of components; Equipped with the plurality of parts is a plurality of bearings, and the component is a lubricant for the plurality of bearings; the measuring device measures a temperature rise in each of the plurality of bearings as a parameter representing the state based on a difference between a temperature of the lubricating oil discharged from each of the plurality of bearings and a temperature of the lubricating oil supplied to the bearing; the monitoring device monitors abnormalities of the plurality of components based on differences in the parameters representing the states corresponding to the plurality of components measured by the measuring device. Anomaly monitoring system.

2. The plurality of parts are, among a plurality of bearings that rotatably support the eccentric shaft, a bearing provided on the side closer to the reducer and a bearing provided on the side closer to the flywheel, The abnormality monitoring system according to claim 1.

3. the monitoring device determines whether an abnormality has occurred in a part of the forging press corresponding to a component based on whether a difference between the parameters representing the states of the plurality of components is equal to or greater than a threshold value, thereby monitoring the abnormality of the component.

3. The abnormality monitoring system according to claim 1 or 2.

4. the monitoring device determines whether or not an abnormality has occurred in a part of the forging press machine corresponding to a component based on whether or not a difference in a rate of change of the parameter representing the state of the plurality of component elements is equal to or greater than a threshold value, thereby monitoring the abnormality of the component. The abnormality monitoring system according to any one of claims 1 to 3.

5. When the monitoring device determines that an abnormality has occurred in a component of the forging press device, the monitoring device notifies the user that an abnormality has occurred in the component. The abnormality monitoring system according to any one of claims 1 to 4.

6. A forging press device, a molding device equipped with an abnormality monitoring system described in any one of claims 1 to 5.

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